PLATES IN VOL. IIL 



Plate L Hypnum pyrenaiciim. — Dicranum glaucum.-— Poly tri chum al- 

 pinum. 

 II. Isothecium Philippianum. 

 ni. Southbya tophacea. 

 IV. New specie? of Sargassum. 



V ) 



Yl* > Anatomy of Eolis. 



VII. Sfructure of Muscular Fibre. 



VIII. Synalissa vulgaris. — Cystocoleus ebeneus. — Coccoclilovis Brebis- 

 sonii. 



ix.-j. 



X. V New species of Sargassum. 



XI. J 



XII.^ 

 XIV r^®^ species of Excavating Sponges. 



xv'J 



XVI. Structure of Vogmarus Islandicus. 



ERRATUM. 

 Page 6, 9 lines from top, /or 11.5 to 180, nad 115 to 130. 



